/**
 * API Client for Claude Code Project Tracker
 */

class ApiClient {
    constructor(baseUrl = '') {
        this.baseUrl = baseUrl;
    }

    async request(endpoint, options = {}) {
        const url = `${this.baseUrl}/api${endpoint}`;
        const config = {
            headers: {
                'Content-Type': 'application/json',
                ...options.headers
            },
            ...options
        };

        try {
            const response = await fetch(url, config);
            
            if (!response.ok) {
                throw new Error(`HTTP error! status: ${response.status}`);
            }
            
            return await response.json();
        } catch (error) {
            console.error(`API request failed: ${endpoint}`, error);
            throw error;
        }
    }

    // Projects API
    async getProjects(limit = 50, offset = 0) {
        return this.request(`/projects?limit=${limit}&offset=${offset}`);
    }

    async getProject(projectId) {
        return this.request(`/projects/${projectId}`);
    }

    async getProjectTimeline(projectId, startDate = null, endDate = null) {
        let url = `/projects/${projectId}/timeline`;
        const params = new URLSearchParams();
        
        if (startDate) params.append('start_date', startDate);
        if (endDate) params.append('end_date', endDate);
        
        if (params.toString()) {
            url += `?${params.toString()}`;
        }
        
        return this.request(url);
    }

    async getProjectStats(projectId, days = 30) {
        return this.request(`/projects/${projectId}/stats?days=${days}`);
    }

    // Analytics API
    async getProductivityMetrics(projectId = null, days = 30) {
        let url = `/analytics/productivity?days=${days}`;
        if (projectId) {
            url += `&project_id=${projectId}`;
        }
        return this.request(url);
    }

    async getDevelopmentPatterns(projectId = null, days = 30) {
        let url = `/analytics/patterns?days=${days}`;
        if (projectId) {
            url += `&project_id=${projectId}`;
        }
        return this.request(url);
    }

    async getLearningInsights(projectId = null, days = 30) {
        let url = `/analytics/learning?days=${days}`;
        if (projectId) {
            url += `&project_id=${projectId}`;
        }
        return this.request(url);
    }

    async getAnalyticsSummary(projectId = null) {
        let url = '/analytics/summary';
        if (projectId) {
            url += `?project_id=${projectId}`;
        }
        return this.request(url);
    }

    // Conversations API
    async searchConversations(query, projectId = null, limit = 20) {
        let url = `/conversations/search?query=${encodeURIComponent(query)}&limit=${limit}`;
        if (projectId) {
            url += `&project_id=${projectId}`;
        }
        return this.request(url);
    }

    async getConversation(conversationId) {
        return this.request(`/conversations/${conversationId}`);
    }

    // Activities API
    async getActivities(sessionId = null, toolName = null, limit = 50, offset = 0) {
        let url = `/activities?limit=${limit}&offset=${offset}`;
        if (sessionId) url += `&session_id=${sessionId}`;
        if (toolName) url += `&tool_name=${toolName}`;
        return this.request(url);
    }

    async getToolUsageStats(sessionId = null, projectId = null, days = 30) {
        let url = `/activities/stats/tools?days=${days}`;
        if (sessionId) url += `&session_id=${sessionId}`;
        if (projectId) url += `&project_id=${projectId}`;
        return this.request(url);
    }

    async getLanguageUsageStats(projectId = null, days = 30) {
        let url = `/activities/stats/languages?days=${days}`;
        if (projectId) url += `&project_id=${projectId}`;
        return this.request(url);
    }

    // Waiting Periods API
    async getWaitingPeriods(sessionId = null, projectId = null, limit = 50, offset = 0) {
        let url = `/waiting/periods?limit=${limit}&offset=${offset}`;
        if (sessionId) url += `&session_id=${sessionId}`;
        if (projectId) url += `&project_id=${projectId}`;
        return this.request(url);
    }

    async getEngagementStats(sessionId = null, projectId = null, days = 7) {
        let url = `/waiting/stats/engagement?days=${days}`;
        if (sessionId) url += `&session_id=${sessionId}`;
        if (projectId) url += `&project_id=${projectId}`;
        return this.request(url);
    }

    // Git Operations API
    async getGitOperations(sessionId = null, projectId = null, operation = null, limit = 50, offset = 0) {
        let url = `/git/operations?limit=${limit}&offset=${offset}`;
        if (sessionId) url += `&session_id=${sessionId}`;
        if (projectId) url += `&project_id=${projectId}`;
        if (operation) url += `&operation=${operation}`;
        return this.request(url);
    }

    async getCommitStats(projectId = null, days = 30) {
        let url = `/git/stats/commits?days=${days}`;
        if (projectId) url += `&project_id=${projectId}`;
        return this.request(url);
    }

    async getGitActivityStats(projectId = null, days = 30) {
        let url = `/git/stats/activity?days=${days}`;
        if (projectId) url += `&project_id=${projectId}`;
        return this.request(url);
    }

    // Sessions API
    async getSession(sessionId) {
        return this.request(`/sessions/${sessionId}`);
    }

    // Health check
    async healthCheck() {
        return this.request('/../health');
    }
}

// Create global API client instance
const apiClient = new ApiClient();

// Utility functions for common operations
const ApiUtils = {
    formatDuration: (minutes) => {
        if (minutes < 60) {
            return `${minutes}m`;
        }
        const hours = Math.floor(minutes / 60);
        const remainingMinutes = minutes % 60;
        return remainingMinutes > 0 ? `${hours}h ${remainingMinutes}m` : `${hours}h`;
    },

    formatDate: (dateString) => {
        const date = new Date(dateString);
        return date.toLocaleDateString() + ' ' + date.toLocaleTimeString([], { 
            hour: '2-digit', 
            minute: '2-digit' 
        });
    },

    formatRelativeTime: (dateString) => {
        const date = new Date(dateString);
        const now = new Date();
        const diffMs = now - date;
        const diffMinutes = Math.floor(diffMs / (1000 * 60));
        const diffHours = Math.floor(diffMinutes / 60);
        const diffDays = Math.floor(diffHours / 24);

        if (diffMinutes < 1) return 'just now';
        if (diffMinutes < 60) return `${diffMinutes}m ago`;
        if (diffHours < 24) return `${diffHours}h ago`;
        if (diffDays < 7) return `${diffDays}d ago`;
        
        return date.toLocaleDateString();
    },

    getToolIcon: (toolName) => {
        const icons = {
            'Edit': 'fas fa-edit',
            'Write': 'fas fa-file-alt',
            'Read': 'fas fa-eye',
            'Bash': 'fas fa-terminal',
            'Grep': 'fas fa-search',
            'Glob': 'fas fa-folder-open',
            'Task': 'fas fa-cogs',
            'WebFetch': 'fas fa-globe'
        };
        return icons[toolName] || 'fas fa-tool';
    },

    getToolColor: (toolName) => {
        const colors = {
            'Edit': 'success',
            'Write': 'primary',
            'Read': 'info',
            'Bash': 'secondary',
            'Grep': 'warning',
            'Glob': 'info',
            'Task': 'dark',
            'WebFetch': 'primary'
        };
        return colors[toolName] || 'secondary';
    },

    getEngagementBadge: (score) => {
        if (score >= 0.8) return { class: 'success', text: 'High' };
        if (score >= 0.5) return { class: 'warning', text: 'Medium' };
        return { class: 'danger', text: 'Low' };
    },

    truncateText: (text, maxLength = 100) => {
        if (!text || text.length <= maxLength) return text;
        return text.substring(0, maxLength) + '...';
    }
};