package tools

import (
	"context"
	"encoding/json"
	"fmt"

	"gitea.d-ma.be/mathias/gitea-mcp/internal/allowlist"
	"gitea.d-ma.be/mathias/gitea-mcp/internal/gitea"
	"gitea.d-ma.be/mathias/gitea-mcp/internal/registry"
)

// WorkflowRunTrigger triggers a Gitea Actions workflow_dispatch run.
type WorkflowRunTrigger struct {
	c       *gitea.Client
	a       *allowlist.Allowlist
	baseURL string
}

func NewWorkflowRunTrigger(c *gitea.Client, a *allowlist.Allowlist, baseURL string) *WorkflowRunTrigger {
	return &WorkflowRunTrigger{c: c, a: a, baseURL: baseURL}
}

func (t *WorkflowRunTrigger) Descriptor() registry.ToolDescriptor {
	return registry.ToolDescriptor{
		Name:        "workflow_run_trigger",
		Description: "Trigger a Gitea Actions workflow_dispatch run.",
		InputSchema: json.RawMessage(`{
			"type":"object",
			"properties":{
				"owner":{"type":"string"},
				"name":{"type":"string"},
				"workflow":{"type":"string"},
				"ref":{"type":"string"},
				"inputs":{"type":"object"}
			},
			"required":["owner","name","workflow"]
		}`),
	}
}

type workflowRunTriggerArgs struct {
	Owner    string         `json:"owner"`
	Name     string         `json:"name"`
	Workflow string         `json:"workflow"`
	Ref      string         `json:"ref"`
	Inputs   map[string]any `json:"inputs"`
}

func (t *WorkflowRunTrigger) Call(ctx context.Context, raw json.RawMessage) (json.RawMessage, error) {
	var args workflowRunTriggerArgs
	if err := parseArgs(raw, &args); err != nil {
		return nil, err
	}
	if err := t.a.Check(args.Owner); err != nil {
		return nil, err
	}
	if args.Workflow == "" {
		return nil, fmt.Errorf("workflow is required: %w", gitea.ErrValidation)
	}

	ref := args.Ref
	if ref == "" {
		var err error
		ref, err = t.c.DefaultBranch(ctx, args.Owner, args.Name)
		if err != nil {
			return nil, err
		}
	}

	result, err := t.c.DispatchWorkflow(ctx, args.Owner, args.Name, args.Workflow, gitea.DispatchWorkflowArgs{
		Ref:    ref,
		Inputs: args.Inputs,
	})
	if err != nil {
		return nil, err
	}

	htmlURL := fmt.Sprintf("%s/%s/%s/actions/runs/%d", t.baseURL, args.Owner, args.Name, result.RunID)
	return textOK(map[string]any{
		"run_id":   result.RunID,
		"html_url": htmlURL,
	})
}