#!/usr/bin/env node
/**
 * API Endpoints UI Tests
 *
 * Tests for all major API endpoints via Puppeteer's page.evaluate(fetch...).
 *
 * Run: node test_api_endpoints_ci.js
 */

const { setupTest, teardownTest, TestResults, log, navigateTo, withTimeout } = require('./test_lib');

// ============================================================================
// Research API Tests
// ============================================================================
const ResearchApiTests = {
    async apiHealthEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/api/v1/health`);
                const data = await response.json();
                return {
                    ok: response.ok,
                    status: response.status,
                    hasStatus: 'status' in data,
                    statusValue: data.status
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        return {
            passed: result.ok && result.status === 200,
            message: result.ok
                ? `Health endpoint OK (status: ${result.statusValue})`
                : `Health endpoint failed: ${result.error || 'status ' + result.status}`
        };
    },

    async apiDocumentationEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/api/v1/`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                return {
                    ok: true,
                    status: response.status,
                    hasEndpoints: 'endpoints' in data || Array.isArray(data) || Object.keys(data).length > 0
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        return {
            passed: result.ok,
            message: result.ok
                ? `API documentation endpoint OK (hasEndpoints: ${result.hasEndpoints})`
                : `API docs failed: ${result.error || 'status ' + result.status}`
        };
    },

    async currentConfigEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/research/api/settings/current-config`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                return {
                    ok: true,
                    status: response.status,
                    hasProvider: 'provider' in data || 'llm_provider' in data,
                    hasModel: 'model' in data || 'model_name' in data
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && result.status === 404) {
            return { passed: null, skipped: true, message: 'Current config endpoint not found' };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `Current config endpoint OK (provider: ${result.hasProvider}, model: ${result.hasModel})`
                : `Config endpoint failed: ${result.error || 'status ' + result.status}`
        };
    },

    async availableModelsEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/settings/`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/settings/api/available-models`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                const modelCount = Array.isArray(data) ? data.length :
                                   (data.models ? data.models.length : Object.keys(data).length);
                return {
                    ok: true,
                    status: response.status,
                    modelCount
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        return {
            passed: result.ok,
            message: result.ok
                ? `Available models endpoint OK (${result.modelCount} models)`
                : `Models endpoint failed: ${result.error || 'status ' + result.status}`
        };
    },

    async availableSearchEnginesEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/settings/`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/settings/api/available-search-engines`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                const engineCount = Array.isArray(data) ? data.length :
                                    (data.engines ? data.engines.length : Object.keys(data).length);
                return {
                    ok: true,
                    status: response.status,
                    engineCount
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        return {
            passed: result.ok,
            message: result.ok
                ? `Available search engines endpoint OK (${result.engineCount} engines)`
                : `Engines endpoint failed: ${result.error || 'status ' + result.status}`
        };
    },

    async ollamaStatusEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/settings/`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/settings/api/ollama-status`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                return {
                    ok: true,
                    status: response.status,
                    running: data.running || data.available || data.status === 'ok',
                    hasModelCount: 'model_count' in data || 'models' in data
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && result.status === 404) {
            return { passed: null, skipped: true, message: 'Ollama status endpoint not found' };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `Ollama status endpoint OK (running: ${result.running})`
                : `Ollama status failed: ${result.error || 'status ' + result.status}`
        };
    },

    async historyApiEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/history`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/api/history`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                const itemCount = Array.isArray(data) ? data.length :
                                  (data.items ? data.items.length : 0);
                return {
                    ok: true,
                    status: response.status,
                    itemCount
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        return {
            passed: result.ok,
            message: result.ok
                ? `History API endpoint OK (${result.itemCount} items)`
                : `History API failed: ${result.error || 'status ' + result.status}`
        };
    },

    async queueStatusEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/api/queue/status`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                return {
                    ok: true,
                    status: response.status,
                    hasQueueInfo: 'pending' in data || 'queue_length' in data || 'active' in data
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && result.status === 404) {
            return { passed: null, skipped: true, message: 'Queue status endpoint not found' };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `Queue status endpoint OK (hasQueueInfo: ${result.hasQueueInfo})`
                : `Queue status failed: ${result.error || 'status ' + result.status}`
        };
    }
};

// ============================================================================
// Metrics API Tests
// ============================================================================
const MetricsApiTests = {
    async metricsApiEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/metrics/`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/metrics/api/metrics`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                return {
                    ok: true,
                    status: response.status,
                    keys: Object.keys(data).slice(0, 5)
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        return {
            passed: result.ok,
            message: result.ok
                ? `Metrics API endpoint OK (keys: ${result.keys.join(', ')})`
                : `Metrics API failed: ${result.error || 'status ' + result.status}`
        };
    },

    async enhancedMetricsEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/metrics/`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/metrics/api/metrics/enhanced`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                return {
                    ok: true,
                    status: response.status,
                    hasData: Object.keys(data).length > 0
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && result.status === 404) {
            return { passed: null, skipped: true, message: 'Enhanced metrics endpoint not found' };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `Enhanced metrics endpoint OK`
                : `Enhanced metrics failed: ${result.error || 'status ' + result.status}`
        };
    },

    async pricingApiEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/metrics/costs`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/metrics/api/pricing`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                const modelCount = Array.isArray(data) ? data.length : Object.keys(data).length;
                return {
                    ok: true,
                    status: response.status,
                    modelCount
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && result.status === 404) {
            return { passed: null, skipped: true, message: 'Pricing API endpoint not found' };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `Pricing API endpoint OK (${result.modelCount} models)`
                : `Pricing API failed: ${result.error || 'status ' + result.status}`
        };
    },

    async rateLimitingApiEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/metrics/`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/metrics/api/rate-limiting`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                return {
                    ok: true,
                    status: response.status,
                    hasData: Object.keys(data).length > 0
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && result.status === 404) {
            return { passed: null, skipped: true, message: 'Rate limiting API endpoint not found' };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `Rate limiting API endpoint OK`
                : `Rate limiting API failed: ${result.error || 'status ' + result.status}`
        };
    },

    async linkAnalyticsApiEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/metrics/links`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/metrics/api/link-analytics`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                return {
                    ok: true,
                    status: response.status,
                    hasData: Object.keys(data).length > 0
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && result.status === 404) {
            return { passed: null, skipped: true, message: 'Link analytics API endpoint not found' };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `Link analytics API endpoint OK`
                : `Link analytics API failed: ${result.error || 'status ' + result.status}`
        };
    },

    async starReviewsApiEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/metrics/star-reviews`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/metrics/api/star-reviews`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                return {
                    ok: true,
                    status: response.status,
                    hasData: Object.keys(data).length > 0
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && result.status === 404) {
            return { passed: null, skipped: true, message: 'Star reviews API endpoint not found' };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `Star reviews API endpoint OK`
                : `Star reviews API failed: ${result.error || 'status ' + result.status}`
        };
    }
};

// ============================================================================
// News API Tests
// ============================================================================
const NewsApiTests = {
    async newsFeedApiEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/news`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/api/news/feed`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                const itemCount = Array.isArray(data) ? data.length :
                                  (data.items ? data.items.length : 0);
                return {
                    ok: true,
                    status: response.status,
                    itemCount
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && result.status === 404) {
            return { passed: null, skipped: true, message: 'News feed API endpoint not found' };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `News feed API endpoint OK (${result.itemCount} items)`
                : `News feed API failed: ${result.error || 'status ' + result.status}`
        };
    },

    async subscriptionsApiEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/news/subscriptions`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/api/news/subscriptions`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                const subCount = Array.isArray(data) ? data.length :
                                 (data.subscriptions ? data.subscriptions.length : 0);
                return {
                    ok: true,
                    status: response.status,
                    subCount
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && result.status === 404) {
            return { passed: null, skipped: true, message: 'Subscriptions API endpoint not found' };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `Subscriptions API endpoint OK (${result.subCount} subscriptions)`
                : `Subscriptions API failed: ${result.error || 'status ' + result.status}`
        };
    },

    async categoriesApiEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/news`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/api/news/categories`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                const catCount = Array.isArray(data) ? data.length : Object.keys(data).length;
                return {
                    ok: true,
                    status: response.status,
                    catCount
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && (result.status === 404 || result.status === 501)) {
            return { passed: null, skipped: true, message: `Categories API endpoint not available (status ${result.status})` };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `Categories API endpoint OK (${result.catCount} categories)`
                : `Categories API failed: ${result.error || 'status ' + result.status}`
        };
    }
};

// ============================================================================
// Library API Tests
// ============================================================================
const LibraryApiTests = {
    async documentsApiEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/library`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/library/api/documents`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                const docCount = Array.isArray(data) ? data.length :
                                 (data.documents ? data.documents.length : 0);
                return {
                    ok: true,
                    status: response.status,
                    docCount
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && result.status === 404) {
            return { passed: null, skipped: true, message: 'Documents API endpoint not found' };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `Documents API endpoint OK (${result.docCount} documents)`
                : `Documents API failed: ${result.error || 'status ' + result.status}`
        };
    },

    async collectionsListApiEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/library`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/library/api/collections/list`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                const collCount = Array.isArray(data) ? data.length :
                                  (data.collections ? data.collections.length : 0);
                return {
                    ok: true,
                    status: response.status,
                    collCount
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && result.status === 404) {
            return { passed: null, skipped: true, message: 'Collections list API endpoint not found' };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `Collections list API endpoint OK (${result.collCount} collections)`
                : `Collections API failed: ${result.error || 'status ' + result.status}`
        };
    }
};

// ============================================================================
// Context Overflow API Tests
// ============================================================================
const ContextOverflowApiTests = {
    async contextOverflowApiEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/metrics/context-overflow`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/metrics/api/context-overflow`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                return {
                    ok: true,
                    status: response.status,
                    hasData: Object.keys(data).length > 0,
                    hasTruncationRate: 'truncation_rate' in data || 'rate' in data
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && result.status === 404) {
            return { passed: null, skipped: true, message: 'Context overflow API endpoint not found' };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `Context overflow API endpoint OK (hasTruncationRate: ${result.hasTruncationRate})`
                : `Context overflow API failed: ${result.error || 'status ' + result.status}`
        };
    }
};

// ============================================================================
// Settings API Tests
// ============================================================================
const SettingsApiTests = {
    async settingsApiEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/settings/`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/settings/api`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                const settingCount = Object.keys(data).length;
                return {
                    ok: true,
                    status: response.status,
                    settingCount
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        return {
            passed: result.ok,
            message: result.ok
                ? `Settings API endpoint OK (${result.settingCount} settings)`
                : `Settings API failed: ${result.error || 'status ' + result.status}`
        };
    },

    async settingsWarningsEndpoint(page, baseUrl) {
        await navigateTo(page, `${baseUrl}/settings/`);

        const result = await page.evaluate(async (url) => {
            try {
                const response = await fetch(`${url}/settings/api/warnings`);
                if (!response.ok) return { ok: false, status: response.status };

                const data = await response.json();
                const warningCount = Array.isArray(data) ? data.length :
                                     (data.warnings ? data.warnings.length : 0);
                return {
                    ok: true,
                    status: response.status,
                    warningCount
                };
            } catch (e) {
                return { ok: false, error: e.message };
            }
        }, baseUrl);

        if (!result.ok && result.status === 404) {
            return { passed: null, skipped: true, message: 'Settings warnings endpoint not found' };
        }

        return {
            passed: result.ok,
            message: result.ok
                ? `Settings warnings endpoint OK (${result.warningCount} warnings)`
                : `Settings warnings failed: ${result.error || 'status ' + result.status}`
        };
    }
};

// ============================================================================
// Main Test Runner
// ============================================================================
async function main() {
    log.section('API Endpoints Tests');

    const ctx = await setupTest({ authenticate: true });
    const results = new TestResults('API Endpoints Tests');
    const { page } = ctx;
    const { baseUrl } = ctx.config;

    const subTestTimeout = ctx.config.isCI ? 60000 : 30000;
    async function run(category, name, testFn) {
        try {
            const result = await withTimeout(
                testFn(page, baseUrl),
                subTestTimeout,
                `${category}/${name}`
            );
            if (result.skipped) {
                results.skip(category, name, result.message);
            } else {
                results.add(category, name, result.passed, result.message);
            }
        } catch (error) {
            results.add(category, name, false, `Error: ${error.message}`);
        }
    }

    try {
        // Research API Tests
        log.section('Research APIs');
        await run('Research', 'API Health Endpoint', (p, u) => ResearchApiTests.apiHealthEndpoint(p, u));
        await run('Research', 'API Documentation Endpoint', (p, u) => ResearchApiTests.apiDocumentationEndpoint(p, u));
        await run('Research', 'Current Config Endpoint', (p, u) => ResearchApiTests.currentConfigEndpoint(p, u));
        await run('Research', 'Available Models Endpoint', (p, u) => ResearchApiTests.availableModelsEndpoint(p, u));
        await run('Research', 'Available Search Engines Endpoint', (p, u) => ResearchApiTests.availableSearchEnginesEndpoint(p, u));
        await run('Research', 'Ollama Status Endpoint', (p, u) => ResearchApiTests.ollamaStatusEndpoint(p, u));
        await run('Research', 'History API Endpoint', (p, u) => ResearchApiTests.historyApiEndpoint(p, u));
        await run('Research', 'Queue Status Endpoint', (p, u) => ResearchApiTests.queueStatusEndpoint(p, u));

        // Metrics API Tests
        log.section('Metrics APIs');
        await run('Metrics', 'Metrics API Endpoint', (p, u) => MetricsApiTests.metricsApiEndpoint(p, u));
        await run('Metrics', 'Enhanced Metrics Endpoint', (p, u) => MetricsApiTests.enhancedMetricsEndpoint(p, u));
        await run('Metrics', 'Pricing API Endpoint', (p, u) => MetricsApiTests.pricingApiEndpoint(p, u));
        await run('Metrics', 'Rate Limiting API Endpoint', (p, u) => MetricsApiTests.rateLimitingApiEndpoint(p, u));
        await run('Metrics', 'Link Analytics API Endpoint', (p, u) => MetricsApiTests.linkAnalyticsApiEndpoint(p, u));
        await run('Metrics', 'Star Reviews API Endpoint', (p, u) => MetricsApiTests.starReviewsApiEndpoint(p, u));

        // News API Tests
        log.section('News APIs');
        await run('News', 'News Feed API Endpoint', (p, u) => NewsApiTests.newsFeedApiEndpoint(p, u));
        await run('News', 'Subscriptions API Endpoint', (p, u) => NewsApiTests.subscriptionsApiEndpoint(p, u));
        await run('News', 'Categories API Endpoint', (p, u) => NewsApiTests.categoriesApiEndpoint(p, u));

        // Library API Tests
        log.section('Library APIs');
        await run('Library', 'Documents API Endpoint', (p, u) => LibraryApiTests.documentsApiEndpoint(p, u));
        await run('Library', 'Collections List API Endpoint', (p, u) => LibraryApiTests.collectionsListApiEndpoint(p, u));

        // Context Overflow API Tests
        log.section('Context Overflow API');
        await run('Context', 'Context Overflow API Endpoint', (p, u) => ContextOverflowApiTests.contextOverflowApiEndpoint(p, u));

        // Settings API Tests
        log.section('Settings APIs');
        await run('Settings', 'Settings API Endpoint', (p, u) => SettingsApiTests.settingsApiEndpoint(p, u));
        await run('Settings', 'Settings Warnings Endpoint', (p, u) => SettingsApiTests.settingsWarningsEndpoint(p, u));

    } catch (error) {
        log.error(`Fatal error: ${error.message}`);
        console.error(error.stack);
    } finally {
        results.print();
        results.save();
        await teardownTest(ctx);
        process.exit(results.exitCode());
    }
}

// Run if executed directly
if (require.main === module) {
    main().catch(error => {
        console.error('Test runner failed:', error);
        process.exit(1);
    });
}

module.exports = { ResearchApiTests, MetricsApiTests, NewsApiTests, LibraryApiTests, ContextOverflowApiTests, SettingsApiTests };