// Project / conversation / message / tab persistence — backed by the
// daemon's SQLite store. All writes round-trip through HTTP so projects
// stay coherent across multiple browser tabs and across restarts.
//
// These helpers fail soft (returning null / [] on transport errors) so
// the UI can stay rendered when the daemon is briefly unreachable.

import type {
  ChatMessage,
  Conversation,
  OpenTabsState,
  Project,
  ProjectMetadata,
  ProjectTemplate,
} from '../types';

export async function listProjects(): Promise<Project[]> {
  try {
    const resp = await fetch('/api/projects');
    if (!resp.ok) return [];
    const json = (await resp.json()) as { projects: Project[] };
    return json.projects ?? [];
  } catch {
    return [];
  }
}

export async function getProject(id: string): Promise<Project | null> {
  try {
    const resp = await fetch(`/api/projects/${encodeURIComponent(id)}`);
    if (!resp.ok) return null;
    const json = (await resp.json()) as { project: Project };
    return json.project;
  } catch {
    return null;
  }
}

export async function createProject(input: {
  name: string;
  skillId: string | null;
  designSystemId: string | null;
  pendingPrompt?: string;
  metadata?: ProjectMetadata;
}): Promise<{ project: Project; conversationId: string } | null> {
  try {
    const id = crypto.randomUUID();
    const resp = await fetch('/api/projects', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ id, ...input }),
    });
    if (!resp.ok) return null;
    return (await resp.json()) as { project: Project; conversationId: string };
  } catch {
    return null;
  }
}

// ---------- templates ----------

export async function listTemplates(): Promise<ProjectTemplate[]> {
  try {
    const resp = await fetch('/api/templates');
    if (!resp.ok) return [];
    const json = (await resp.json()) as { templates: ProjectTemplate[] };
    return json.templates ?? [];
  } catch {
    return [];
  }
}

export async function getTemplate(id: string): Promise<ProjectTemplate | null> {
  try {
    const resp = await fetch(`/api/templates/${encodeURIComponent(id)}`);
    if (!resp.ok) return null;
    const json = (await resp.json()) as { template: ProjectTemplate };
    return json.template;
  } catch {
    return null;
  }
}

export async function saveTemplate(input: {
  name: string;
  description?: string;
  sourceProjectId: string;
}): Promise<ProjectTemplate | null> {
  try {
    const resp = await fetch('/api/templates', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(input),
    });
    if (!resp.ok) return null;
    const json = (await resp.json()) as { template: ProjectTemplate };
    return json.template;
  } catch {
    return null;
  }
}

export async function deleteTemplate(id: string): Promise<boolean> {
  try {
    const resp = await fetch(`/api/templates/${encodeURIComponent(id)}`, {
      method: 'DELETE',
    });
    return resp.ok;
  } catch {
    return false;
  }
}

export async function patchProject(
  id: string,
  patch: Partial<Project>,
): Promise<Project | null> {
  try {
    const resp = await fetch(`/api/projects/${encodeURIComponent(id)}`, {
      method: 'PATCH',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(patch),
    });
    if (!resp.ok) return null;
    const json = (await resp.json()) as { project: Project };
    return json.project;
  } catch {
    return null;
  }
}

export async function deleteProject(id: string): Promise<boolean> {
  try {
    const resp = await fetch(`/api/projects/${encodeURIComponent(id)}`, {
      method: 'DELETE',
    });
    return resp.ok;
  } catch {
    return false;
  }
}

// ---------- conversations ----------

export async function listConversations(
  projectId: string,
): Promise<Conversation[]> {
  try {
    const resp = await fetch(
      `/api/projects/${encodeURIComponent(projectId)}/conversations`,
    );
    if (!resp.ok) return [];
    const json = (await resp.json()) as { conversations: Conversation[] };
    return json.conversations ?? [];
  } catch {
    return [];
  }
}

export async function createConversation(
  projectId: string,
  title?: string,
): Promise<Conversation | null> {
  try {
    const resp = await fetch(
      `/api/projects/${encodeURIComponent(projectId)}/conversations`,
      {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ title }),
      },
    );
    if (!resp.ok) return null;
    const json = (await resp.json()) as { conversation: Conversation };
    return json.conversation;
  } catch {
    return null;
  }
}

export async function patchConversation(
  projectId: string,
  conversationId: string,
  patch: Partial<Conversation>,
): Promise<Conversation | null> {
  try {
    const resp = await fetch(
      `/api/projects/${encodeURIComponent(projectId)}/conversations/${encodeURIComponent(conversationId)}`,
      {
        method: 'PATCH',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(patch),
      },
    );
    if (!resp.ok) return null;
    const json = (await resp.json()) as { conversation: Conversation };
    return json.conversation;
  } catch {
    return null;
  }
}

export async function deleteConversation(
  projectId: string,
  conversationId: string,
): Promise<boolean> {
  try {
    const resp = await fetch(
      `/api/projects/${encodeURIComponent(projectId)}/conversations/${encodeURIComponent(conversationId)}`,
      { method: 'DELETE' },
    );
    return resp.ok;
  } catch {
    return false;
  }
}

// ---------- messages ----------

export async function listMessages(
  projectId: string,
  conversationId: string,
): Promise<ChatMessage[]> {
  try {
    const resp = await fetch(
      `/api/projects/${encodeURIComponent(projectId)}/conversations/${encodeURIComponent(conversationId)}/messages`,
    );
    if (!resp.ok) return [];
    const json = (await resp.json()) as { messages: ChatMessage[] };
    return json.messages ?? [];
  } catch {
    return [];
  }
}

export async function saveMessage(
  projectId: string,
  conversationId: string,
  message: ChatMessage,
): Promise<void> {
  try {
    await fetch(
      `/api/projects/${encodeURIComponent(projectId)}/conversations/${encodeURIComponent(conversationId)}/messages/${encodeURIComponent(message.id)}`,
      {
        method: 'PUT',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(message),
      },
    );
  } catch {
    // best-effort persistence — UI keeps the message in-memory either way
  }
}

// ---------- tabs ----------

export async function loadTabs(projectId: string): Promise<OpenTabsState> {
  try {
    const resp = await fetch(
      `/api/projects/${encodeURIComponent(projectId)}/tabs`,
    );
    if (!resp.ok) return { tabs: [], active: null };
    return (await resp.json()) as OpenTabsState;
  } catch {
    return { tabs: [], active: null };
  }
}

export async function saveTabs(
  projectId: string,
  state: OpenTabsState,
): Promise<void> {
  try {
    await fetch(`/api/projects/${encodeURIComponent(projectId)}/tabs`, {
      method: 'PUT',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(state),
    });
  } catch {
    // best-effort
  }
}