/**
 * Projects API Routes
 * CRUD operations for projects
 */

import { db } from '../../db/client'
import { projects } from '../../db/schema'
import { eq } from 'drizzle-orm'
import { randomUUID } from 'crypto'

/**
 * Handle all project routes
 */
export async function handleProjectRoutes(req: Request, url: URL): Promise<Response> {
  const method = req.method
  const pathParts = url.pathname.split('/').filter(Boolean)

  // GET /api/projects - List all projects
  if (method === 'GET' && pathParts.length === 2) {
    return await listProjects()
  }

  // GET /api/projects/:id - Get single project
  if (method === 'GET' && pathParts.length === 3) {
    const projectId = pathParts[2]
    return await getProject(projectId)
  }

  // POST /api/projects - Create project
  if (method === 'POST' && pathParts.length === 2) {
    return await createProject(req)
  }

  // PATCH /api/projects/:id - Update project
  if (method === 'PATCH' && pathParts.length === 3) {
    const projectId = pathParts[2]
    return await updateProject(projectId, req)
  }

  // DELETE /api/projects/:id - Delete project
  if (method === 'DELETE' && pathParts.length === 3) {
    const projectId = pathParts[2]
    return await deleteProject(projectId)
  }

  return new Response('Not Found', { status: 404 })
}

/**
 * List all projects
 */
async function listProjects(): Promise<Response> {
  try {
    const allProjects = await db.select().from(projects)

    return Response.json({
      success: true,
      data: allProjects,
      count: allProjects.length,
    })
  } catch (error) {
    console.error('Error listing projects:', error)
    return Response.json({
      success: false,
      error: 'Failed to list projects',
    }, { status: 500 })
  }
}

/**
 * Get single project
 */
async function getProject(projectId: string): Promise<Response> {
  try {
    const project = await db
      .select()
      .from(projects)
      .where(eq(projects.id, projectId))
      .limit(1)

    if (project.length === 0) {
      return Response.json({
        success: false,
        error: 'Project not found',
      }, { status: 404 })
    }

    return Response.json({
      success: true,
      data: project[0],
    })
  } catch (error) {
    console.error('Error getting project:', error)
    return Response.json({
      success: false,
      error: 'Failed to get project',
    }, { status: 500 })
  }
}

/**
 * Create project
 */
async function createProject(req: Request): Promise<Response> {
  try {
    const body = await req.json()

    // Validate required fields
    if (!body.name) {
      return Response.json({
        success: false,
        error: 'Name is required',
      }, { status: 400 })
    }

    // Generate k8s namespace name from project name
    const k8sNamespace = `proj-${body.name.toLowerCase().replace(/[^a-z0-9-]/g, '-')}`

    const newProject = {
      id: randomUUID(),
      name: body.name,
      description: body.description || null,
      k8sNamespace,
      giteaRepoId: body.giteaRepoId || null,
      giteaRepoUrl: body.giteaRepoUrl || null,
      giteaOwner: body.giteaOwner || null,
      giteaRepoName: body.giteaRepoName || null,
      defaultBranch: body.defaultBranch || 'main',
      dockerImage: body.dockerImage || null,
      envVars: body.envVars || null,
      replicas: body.replicas || 1,
      cpuLimit: body.cpuLimit || '500m',
      memoryLimit: body.memoryLimit || '512Mi',
      status: body.status || 'active',
    }

    await db.insert(projects).values(newProject)

    return Response.json({
      success: true,
      data: newProject,
    }, { status: 201 })
  } catch (error) {
    console.error('Error creating project:', error)
    return Response.json({
      success: false,
      error: 'Failed to create project',
    }, { status: 500 })
  }
}

/**
 * Update project
 */
async function updateProject(projectId: string, req: Request): Promise<Response> {
  try {
    const body = await req.json()

    // Check if project exists
    const existing = await db
      .select()
      .from(projects)
      .where(eq(projects.id, projectId))
      .limit(1)

    if (existing.length === 0) {
      return Response.json({
        success: false,
        error: 'Project not found',
      }, { status: 404 })
    }

    // Update only provided fields
    const updateData: any = {}

    if (body.name !== undefined) updateData.name = body.name
    if (body.description !== undefined) updateData.description = body.description
    if (body.giteaRepoId !== undefined) updateData.giteaRepoId = body.giteaRepoId
    if (body.giteaRepoUrl !== undefined) updateData.giteaRepoUrl = body.giteaRepoUrl
    if (body.giteaOwner !== undefined) updateData.giteaOwner = body.giteaOwner
    if (body.giteaRepoName !== undefined) updateData.giteaRepoName = body.giteaRepoName
    if (body.defaultBranch !== undefined) updateData.defaultBranch = body.defaultBranch
    if (body.dockerImage !== undefined) updateData.dockerImage = body.dockerImage
    if (body.envVars !== undefined) updateData.envVars = body.envVars
    if (body.replicas !== undefined) updateData.replicas = body.replicas
    if (body.cpuLimit !== undefined) updateData.cpuLimit = body.cpuLimit
    if (body.memoryLimit !== undefined) updateData.memoryLimit = body.memoryLimit
    if (body.status !== undefined) updateData.status = body.status

    await db
      .update(projects)
      .set(updateData)
      .where(eq(projects.id, projectId))

    // Get updated project
    const updated = await db
      .select()
      .from(projects)
      .where(eq(projects.id, projectId))
      .limit(1)

    return Response.json({
      success: true,
      data: updated[0],
    })
  } catch (error) {
    console.error('Error updating project:', error)
    return Response.json({
      success: false,
      error: 'Failed to update project',
    }, { status: 500 })
  }
}

/**
 * Delete project
 */
async function deleteProject(projectId: string): Promise<Response> {
  try {
    // Check if project exists
    const existing = await db
      .select()
      .from(projects)
      .where(eq(projects.id, projectId))
      .limit(1)

    if (existing.length === 0) {
      return Response.json({
        success: false,
        error: 'Project not found',
      }, { status: 404 })
    }

    await db.delete(projects).where(eq(projects.id, projectId))

    return Response.json({
      success: true,
      message: 'Project deleted',
    })
  } catch (error) {
    console.error('Error deleting project:', error)
    return Response.json({
      success: false,
      error: 'Failed to delete project',
    }, { status: 500 })
  }
}